/* Tab "Người đi làm & DN" (3 nhánh: Văn phòng, Công xưởng, Kinh doanh tự do) và tab "Tiếng Trung thường nhật".
   Trang /giao-trinh/, dữ liệu dựng bởi khoa-di-lam.js (05/11/2026).
   Tiền tố riêng kdl- (đi làm) và ttn- (thường nhật) để không dính quy tắc chung .l-card, .rqx-vcard, .course-panel. */

/* ===== Khung chung tab Người đi làm ===== */
.kdl { padding: 24px 0 40px; }
.kdl p { max-width: none; }
.kdl-intro { margin: 0 0 14px; }
.kdl-intro h2 { margin: 0 0 4px; font-size: clamp(21px, 2.4vw, 27px); color: var(--navy); }
.kdl-intro p { margin: 0; color: var(--muted); font-size: 15px; }

/* 3 tab lớn */
.kdl-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 0 0 18px; }
.kdl-tab { appearance: none; text-align: left; font: inherit; cursor: pointer; display: flex; gap: 12px; align-items: center; padding: 14px 16px; border-radius: 16px; border: 2px solid var(--t-line); background: var(--t-soft); color: var(--t-ink); transition: transform .15s, box-shadow .15s, background .15s; min-width: 0; }
.kdl-tab:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(15, 23, 42, .08); }
.kdl-tab .ic { flex: none; width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; font-size: 24px; background: #fff; box-shadow: inset 0 0 0 1.5px var(--t-line); }
.kdl-tab .tx { min-width: 0; }
.kdl-tab b { display: block; font-size: 16.5px; line-height: 1.3; font-family: var(--fx-head, Arial, sans-serif); }
.kdl-tab small { display: block; font-size: 12.5px; color: var(--t-sub); line-height: 1.35; margin-top: 2px; }
.kdl-tab.on { background: var(--t-head); border-color: var(--t-head); color: #fff; box-shadow: 0 4px 0 var(--t-acc), 0 10px 22px rgba(15, 23, 42, .12); }
.kdl-tab.on small { color: rgba(255, 255, 255, .82); }
.kdl-tab.on .ic { background: rgba(255, 255, 255, .14); box-shadow: inset 0 0 0 1.5px rgba(255, 255, 255, .3); }

/* Bảng màu từng nhánh: văn phòng (navy, slate), công xưởng (vàng an toàn, xám thép), kinh doanh (xanh ngọc, cam) */
.kdl-t-vp { --t-head: #1E3A5F; --t-head2: #2C4A72; --t-acc: #7C9CC4; --t-soft: #F3F6FA; --t-line: #C9D5E4; --t-ink: #1E2B3C; --t-sub: #5B6B80; --t-chip: #E6EDF6; }
.kdl-t-cx { --t-head: #3A434F; --t-head2: #4B5563; --t-acc: #93ACBF; --t-soft: #F5F5F2; --t-line: #D6D3C4; --t-ink: #262A30; --t-sub: #6B6F76; --t-chip: #F1F5F9; }
.kdl-t-kd { --t-head: #0F766E; --t-head2: #13887F; --t-acc: #3D8D83; --t-soft: #EEF9F7; --t-line: #B5E0D9; --t-ink: #12302D; --t-sub: #4E6E6A; --t-chip: #F2F8F7; }

/* Một nhánh */
.kdl-p { border-radius: 22px; background: var(--t-soft); border: 1.5px solid var(--t-line); padding: 0 0 22px; overflow: hidden; }
.kdl-p[hidden] { display: none; }
.kdl-hero { position: relative; color: #fff; background: linear-gradient(120deg, var(--t-head) 0%, var(--t-head2) 100%); padding: 22px 24px 20px; }
.kdl-hero h3 { margin: 0 0 6px; font-size: clamp(20px, 2.2vw, 25px); color: #fff; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.kdl-hero p { margin: 0; max-width: 820px; color: rgba(255, 255, 255, .9); font-size: 15px; }
.kdl-stats { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.kdl-stats span { font-size: 13px; font-weight: 600; padding: 3px 11px; border-radius: 999px; background: rgba(255, 255, 255, .14); border: 1px solid rgba(255, 255, 255, .26); }
.kdl-badge { display: inline-block; font-size: 12.5px; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: var(--t-acc); color: #fff; letter-spacing: .2px; vertical-align: middle; }
.kdl-body { padding: 18px 24px 0; }

/* Văn phòng: vạch kẻ mảnh như sổ tay công sở */
.kdl-t-vp .kdl-hero::after { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(0deg, transparent 0 25px, rgba(255, 255, 255, .045) 25px 26px); pointer-events: none; }
/* Công xưởng: dải sọc vàng đen cảnh báo an toàn */
.kdl-t-cx .kdl-hero { padding-bottom: 30px; }
.kdl-t-cx .kdl-hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 10px; background: repeating-linear-gradient(-45deg, #93ACBF 0 14px, #262A30 14px 28px); }
.kdl-t-cx .kdl-badge { color: #262A30; }
/* Kinh doanh: chấm cam điểm xuyết */
.kdl-t-kd .kdl-hero::after { content: ""; position: absolute; right: 18px; top: 16px; width: 90px; height: 90px; border-radius: 50%; background: radial-gradient(circle, rgba(249, 115, 22, .55) 0 30%, transparent 31%), radial-gradient(circle at 70% 70%, rgba(255, 255, 255, .12) 0 45%, transparent 46%); pointer-events: none; }

/* Chọn khóa trong nhánh (Văn phòng có Đi làm 2 và Đi làm 3) */
.kdl-cbar { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 14px; }
.kdl-cbtn { appearance: none; font: inherit; cursor: pointer; border: 1.5px solid var(--t-line); background: #fff; color: var(--t-ink); border-radius: 12px; padding: 8px 14px; font-weight: 700; font-size: 14.5px; display: inline-flex; gap: 8px; align-items: center; }
.kdl-cbtn small { font-weight: 600; font-size: 12px; color: var(--t-sub); }
.kdl-cbtn:hover { border-color: var(--t-head); }
.kdl-cbtn.on { background: var(--t-head); border-color: var(--t-head); color: #fff; }
.kdl-cbtn.on small { color: rgba(255, 255, 255, .8); }

/* Đầu khóa */
.kdl-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; background: #fff; border: 1.5px solid var(--t-line); border-left: 5px solid var(--t-head); border-radius: 16px; padding: 14px 16px; }
.kdl-head h4 { margin: 4px 0 0; font-size: 19px; color: var(--t-ink); line-height: 1.35; }
.kdl-head .sub { font-size: 13.5px; color: var(--t-sub); margin-top: 2px; }
.kdl-head .acts { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.kdl .rqx-fold { margin: 12px 0 0; border-color: var(--t-line); }
.kdl .rqx-fold > summary { font-size: 15px; }

/* Danh sách bài: tên bài + giới thiệu bên trái, một nút Vào học bên phải */
.kdl-list { list-style: none; margin: 14px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.kdl-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 14px; align-items: center; background: #fff; border: 1.5px solid var(--t-line); border-radius: 14px; padding: 12px 16px; transition: border-color .15s, box-shadow .15s; }
.kdl-row:hover { border-color: var(--t-head); box-shadow: 0 4px 14px rgba(15, 23, 42, .06); }
.kdl-no { font-size: 13px; font-weight: 800; white-space: nowrap; color: var(--t-head); background: var(--t-chip); border-radius: 10px; padding: 6px 10px; text-align: center; min-width: 64px; }
.kdl-t-cx .kdl-no { color: #262A30; border-left: 4px solid #93ACBF; }
.kdl-t-kd .kdl-no { color: #9A3412; }
.kdl-txt { min-width: 0; }
.kdl-ttl { margin: 0; font-size: 16.5px; font-weight: 700; color: var(--t-ink); line-height: 1.4; }
.kdl-ttl .zh { font-family: var(--zh); font-weight: 800; color: var(--t-head); margin-right: 8px; }
.kdl-t-kd .kdl-ttl .zh { color: #0F766E; }
.kdl-desc { margin: 3px 0 0; font-size: 14px; color: var(--t-sub); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.kdl-go { display: inline-flex; align-items: center; justify-content: center; gap: 6px; white-space: nowrap; min-height: 40px; padding: 8px 18px; border-radius: 11px; font-weight: 700; font-size: 14.5px; text-decoration: none; background: var(--t-head); color: #fff; border: 1.5px solid var(--t-head); box-shadow: 0 3px 0 var(--t-acc); transition: transform .15s, filter .15s; }
.kdl-go:hover { transform: translateY(-1px); filter: brightness(1.08); color: #fff; }
.kdl-t-cx .kdl-go { background: #93ACBF; border-color: #6E879B; color: #262A30; box-shadow: 0 3px 0 #3A434F; }
.kdl-t-cx .kdl-go:hover { color: #262A30; }
.kdl-t-kd .kdl-go { background: #3D8D83; border-color: #EA580C; box-shadow: 0 3px 0 #0F766E; }
.kdl-soon { display: inline-flex; align-items: center; white-space: nowrap; min-height: 36px; padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 700; color: #9A3412; background: #FFF4EC; border: 1.5px dashed #FDBA8C; }

/* Ghi chú nhánh đang biên soạn và gợi ý học tạm */
.kdl-note { background: #fff; border: 1.5px dashed var(--t-line); border-radius: 14px; padding: 12px 16px; font-size: 14.5px; color: var(--t-ink); }
.kdl-note b { color: var(--t-head); }
.kdl-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.kdl-links a { font-size: 13.5px; font-weight: 600; padding: 5px 12px; border-radius: 999px; background: var(--t-soft); border: 1px solid var(--t-line); color: var(--t-ink); text-decoration: none; }
.kdl-links a:hover { border-color: var(--t-head); color: var(--t-head); }

/* Video miễn phí cùng chủ đề */
.kdl-vids { margin-top: 26px; }
.kdl-vids h4 { margin: 0 0 4px; font-size: 18px; color: var(--t-ink); }
.kdl-vids .hint { margin: 0 0 12px; font-size: 13.5px; color: var(--t-sub); }
.kdl-vgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.kdl-v { background: #fff; border: 1.5px solid var(--t-line); border-radius: 14px; overflow: hidden; display: flex; flex-direction: column; min-width: 0; }
.kdl-v .rqx-video-frame { position: relative; aspect-ratio: 16 / 9; background: #0F172A; }
.kdl-v .rqx-video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.kdl-v .vi { padding: 10px 12px 12px; }
.kdl-v .vt { margin: 0; font-size: 14px; font-weight: 700; color: var(--t-ink); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.kdl-v .vc { margin: 3px 0 0; font-size: 12.5px; color: var(--t-sub); }
.kdl-v .vr { margin: 5px 0 0; font-size: 13px; color: var(--t-ink); }
.kdl-v .rqx-video-bar { margin: 0; border-radius: 0; }

@media (max-width: 960px) {
  .kdl-vgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .kdl-tabs { gap: 8px; }
  .kdl-tab { flex-direction: column; align-items: center; text-align: center; gap: 6px; padding: 10px 6px; }
  .kdl-tab .ic { width: 38px; height: 38px; font-size: 20px; }
  .kdl-tab b { font-size: 13.5px; }
  .kdl-tab small { display: none; }
  .kdl-hero { padding: 18px 16px 16px; }
  .kdl-t-cx .kdl-hero { padding-bottom: 26px; }
  .kdl-body { padding: 14px 12px 0; }
  .kdl-row { grid-template-columns: minmax(0, 1fr); gap: 8px; padding: 12px 14px; }
  .kdl-no { justify-self: start; min-width: 0; padding: 3px 10px; }
  .kdl-go, .kdl-soon { justify-self: stretch; }
  .kdl-vgrid { grid-template-columns: minmax(0, 1fr); }
  .kdl-head .acts { width: 100%; }
}

/* ===== Tab Tiếng Trung thường nhật: tông ấm, gần gũi ===== */
.ttn { padding: 24px 0 40px; --w-ink: #3D2B1F; --w-sub: #7A6252; --w-bg: #FFF8F0; --w-line: #F1D9C2; --w-acc: #E07A3F; --w-acc2: #2F9E6E; }
.ttn p { max-width: none; }
.ttn-hero { border-radius: 22px; padding: 22px 24px; background: linear-gradient(135deg, #FFF1E2 0%, #FFE4CC 55%, #FDEBD8 100%); border: 1.5px solid var(--w-line); color: var(--w-ink); position: relative; overflow: hidden; }
.ttn-hero::after { content: "家"; position: absolute; right: 18px; bottom: -22px; font-family: var(--zh); font-size: 120px; font-weight: 900; color: rgba(224, 122, 63, .12); line-height: 1; pointer-events: none; }
.ttn-hero h2 { margin: 0 0 6px; font-size: clamp(21px, 2.4vw, 27px); color: #8A3B12; }
.ttn-hero p { margin: 0; max-width: 760px; font-size: 15px; color: var(--w-sub); }

.ttn-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.ttn-tab { appearance: none; font: inherit; cursor: pointer; border: 1.5px solid var(--w-line); background: #fff; color: var(--w-ink); border-radius: 999px; padding: 8px 14px; font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; transition: background .15s, border-color .15s; }
.ttn-tab:hover { border-color: var(--w-acc); background: #FFF6EE; }
.ttn-tab.on { background: var(--w-acc); border-color: var(--w-acc); color: #fff; box-shadow: 0 3px 0 #B95A25; }
.ttn-tab .soon { font-size: 11px; font-weight: 700; padding: 1px 7px; border-radius: 999px; background: #FDEBD8; color: #9A4A1C; }
.ttn-tab.on .soon { background: rgba(255, 255, 255, .25); color: #fff; }

.ttn-p { background: var(--w-bg); border: 1.5px solid var(--w-line); border-radius: 20px; padding: 18px 20px 22px; }
.ttn-p[hidden] { display: none; }
.ttn-p h3 { margin: 0 0 4px; font-size: 20px; color: #8A3B12; }
.ttn-p .lead { margin: 0 0 14px; color: var(--w-sub); font-size: 14.5px; }

.ttn-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.ttn-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 14px; align-items: center; background: #fff; border: 1.5px solid var(--w-line); border-radius: 16px; padding: 14px 16px; }
.ttn-row:hover { border-color: var(--w-acc); box-shadow: 0 4px 14px rgba(138, 59, 18, .07); }
.ttn-ic { width: 50px; height: 50px; border-radius: 50%; display: grid; place-items: center; font-size: 25px; background: #FFF1E2; border: 1.5px solid var(--w-line); }
.ttn-lv { display: inline-block; font-size: 12.5px; font-weight: 700; color: #1F6B4B; background: #E5F6EE; border-radius: 999px; padding: 2px 10px; }
.ttn-row h4 { margin: 4px 0 2px; font-size: 16.5px; color: var(--w-ink); line-height: 1.4; }
.ttn-row p { margin: 0; font-size: 14px; color: var(--w-sub); line-height: 1.5; }
.ttn-go { display: inline-flex; align-items: center; justify-content: center; white-space: nowrap; min-height: 40px; padding: 8px 18px; border-radius: 999px; font-weight: 700; font-size: 14.5px; text-decoration: none; background: var(--w-acc2); color: #fff; box-shadow: 0 3px 0 #1F6B4B; }
.ttn-go:hover { filter: brightness(1.07); color: #fff; }

.ttn-more { margin-top: 16px; background: #fff; border: 1.5px dashed var(--w-line); border-radius: 14px; padding: 12px 16px; font-size: 14.5px; color: var(--w-ink); }
.ttn-more .kdl-links a, .ttn-soon .kdl-links a { background: #FFF6EE; border-color: var(--w-line); color: var(--w-ink); }

.ttn-soon { text-align: center; padding: 26px 16px 20px; }
.ttn-soon .big { font-size: 44px; line-height: 1; }
.ttn-soon h3 { margin: 10px 0 6px; }
.ttn-soon p { margin: 0 auto; max-width: 620px; color: var(--w-sub); font-size: 14.5px; }
.ttn-soon ul { text-align: left; display: inline-block; margin: 12px auto 0; padding-left: 20px; color: var(--w-ink); font-size: 14.5px; }
.ttn-soon .tag { display: inline-block; margin-top: 12px; font-size: 13px; font-weight: 700; padding: 4px 12px; border-radius: 999px; background: #FDEBD8; color: #9A4A1C; }
.ttn-soon .kdl-links { justify-content: center; }

/* Video đời sống dùng chung khung video của kdl, đổi màu ấm */
.ttn .kdl-vids { --t-ink: #3D2B1F; --t-sub: #7A6252; --t-line: #F1D9C2; }

@media (max-width: 720px) {
  .ttn-hero { padding: 18px 16px; }
  .ttn-hero::after { font-size: 90px; }
  .ttn-p { padding: 14px 12px 18px; }
  .ttn-tabs { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 6px; -webkit-overflow-scrolling: touch; }
  .ttn-tab { flex: none; }
  .ttn-row { grid-template-columns: auto minmax(0, 1fr); }
  .ttn-row .ttn-go { grid-column: 1 / -1; }
  .ttn-ic { width: 42px; height: 42px; font-size: 21px; }
}